The following guide showcases top 80 lower jigs and rotary tables commonly used with 80/20 or similar 1.5″ x 1.5″ t-slot aluminum extrusions and compact milling setups. These accessories help align, drill, and index holes with repeatable accuracy, ideal for small shop CNC or manual mill projects. Each entry includes a concise feature set to help compare capabilities and select the right jig or rotary table for your milling tasks.
Summary of selected products:
- 80/20 15 Series Access Hole Drill Jig for 1.5″ x 1.5″ T-Slot Aluminum Extrusion
- MachEl 3″ (80mm) Rotary Table for Milling Machines
- AD INTERNATIONAL 3″ / 80 mm Milling Indexing Rotary Table with 65 mm 3-Jaw Chuck
- MachEl 4″ (100 mm) Rotary Table Precision Horizontal Vertical
- PRESIZE 3″ / 80 mm Milling Rotary Table with 50 mm 4-Jaw Chuck
80/20 15 Series Access Hole Drill Jig For 1.5″ x 1.5″ T-Slot Profiles
Overview: This drill jig is designed to guide access hole placement along 80/20 1.5″ x 1.5″ extruded aluminum profiles. It features a durable aluminum body with a clear anodized finish and dowel pins to aid centering. The self-centering drill guide accommodates drilling 0.281″ (7.1 mm) access holes in 15 Series 1515 profiles, optimizing alignment for projects built with 80/20 components. The jig reduces measurement guesswork and helps reproduce precise hole locations for mounting hardware, fixtures, or accessories on modular frames.
Key considerations: The jig’s compatibility with 1.5″ x 1.5″ extrusions makes it a strong fit for small to medium-sized framing systems. The included dowel pins help lock the jig in place, which is critical for repeatable hole spacing. Material construction and finish contribute to longevity in workshop environments, while the 0.281″ hole size serves common fastener or bolt applications. However, users should verify their own hole size tolerances and ensure the jig’s alignment features align with their specific extrusions and profiles.
MachEl 3″ (80mm) Rotary Table For Milling Machines
Overview: This compact, low-profile rotary table is designed for precision indexing on small to mid-sized milling machines. At 3″ (80 mm) in diameter, it provides stable workholding and indexing capability in tight spaces. The unit features a 36:1 gear ratio, allowing controlled and repeatable movement with each full handle rotation translating to a precise 10° increment. It’s well-suited for hobbyist and professional settings where space is at a premium and accurate angular positioning is necessary for tasks like engraving, pocketing, or circular feature work on small components.
Key considerations: The 3″ table size favors smaller workpieces and lighter setups, reducing clutter in constrained shop environments. The 36:1 gear ratio supports fine indexing, but users should assess the maximum load and rigidity for heavier cuts. Setup simplicity and a compact footprint can minimize setup time, yet its smaller diameter may limit the range of workpieces that can be accommodated. Compatibility with standard mounting patterns and accessories should be checked for broader use.
AD INTERNATIONAL 3″ / 80 mm Milling Indexing Rotary Table With 65 mm 3-Jaw Chuck
Overview: This product pairs a 3″ / 80 mm rotary table with a 65 mm 3-jaw self-centering chuck, offering a compact solution for precise circular or angular machining on small mills. The combo is designed for horizontal or vertical mounting and includes back plate and fixing T-nuts bolts, providing a versatile setup for various milling tasks. The self-centering chuck helps secure workpieces with consistent gripping without manual centering, aiding repeatability in small-volume or prototype runs.
Key considerations: The included chuck and back plate expand clamping options, but operators should verify jaw capacity and workpiece size relative to the 3″ table. Mounting versatility supports multiple orientations, but users should ensure stability under cutting conditions. The compact form factor suits tight workshops, though larger machining tasks may demand bigger tables or additional clamping accessories for heavier materials.
MachEl 4″ (100 mm) Rotary Table With 65 mm 3-Jaws Chuck
Overview: This 4″ (100 mm) rotary table concentrates precision in a compact package, ideal for smaller milling machines. It supports horizontal and vertical mounting, enabling versatile indexing for a range of operations. The inclusion of a chuck and back plate with mounting hardware enhances clamping stability and repeatability across jobs, making it suitable for tasks such as gear cutting, circular pocketing, and locating holes at precise angles.
Key considerations: The 4″ table strikes a balance between work area and device footprint. Review the table’s maximum load rating and ensure the chuck size aligns with your typical workpiece. The 360-degree graduated scale with a worm gear ratio enables smooth, repeatable positioning; however, operator experience in fine indexing will influence results. Adequate clamping and alignment routines are essential for achieving high-precision outcomes in repeat runs.
PRESIZE 3″/ 80 mm Milling Rotary Table With 50 mm 4-Jaw Self Centering Chuck
Overview: This PRESIZE kit delivers a 3″ / 80 mm low-profile rotary table paired with a 50 mm four-jaw self-centering chuck, along with a back plate and fixing hardware. The combination offers flexible mounting in horizontal or vertical orientations and supports precise, centered workholding for a variety of milling operations. The four-jaw design enables independent, square alignment of irregularly shaped parts, enhancing versatility for non-regular workpieces or custom fixtures.
Key considerations: The four-jaw chuck increases setup complexity compared to a three-jaw model but provides superior centering for irregular shapes. Users should confirm the chuck’s working range and ensure compatibility with their milling machine’s spindle and mounting standards. The kit’s low-profile design is advantageous for tight spaces, though it may require careful clamping to avoid deflection during heavier cuts. Overall, it suits precise, small-to-medium scale projects where repeatability and accurate centering matter.
Buying Guide: Key Purchase Considerations
- Workpiece size and machine compatibility: Choose rotary tables and jigs whose diameters, mounting patterns, and table heights fit your milling machine and intended workspace. Smaller mills benefit from compact, low-profile tables, while larger machines can handle bigger diameters and higher load capacities.
- Indexing precision and gear ratio: Consider the gearing and graduations. Higher gear ratios and finely graduated scales enable tighter angular control, which is essential for circular pockets, gear teeth, and evenly spaced holes.
- Clamping and chuck options: Self-centering three-jaw chucks are quick for symmetric parts, while four-jaw or independent chucks excel at irregular shapes. Verify chuck capacity and jaw type to ensure secure workholding for your typical material.
- Mounting versatility: Horizontal and vertical mounting capabilities increase the range of operations. Confirm the compatibility of back plates, T-nuts, and fixing bolts with your machine and table.
- Durability and finish: Anodized or coated surfaces resist corrosion and prolong life in workshop environments. For frequent use, prioritize rigid construction and stable play-free movement.
- Setup time and repeatability: Features such as centering pins, dowel alignment, and pre-aligned jigs reduce setup time and improve repeatability across multiple parts or runs.
- Budget versus value: While compact systems are attractive for small shops, evaluate whether a larger, more capable table provides long-term savings through reduced changeovers and higher precision.
For best results, match the chosen jig or rotary table with your typical workflow. If your projects require frequent hole alignment on 1.5″ x 1.5″ extrusion frames, the 80/20 drill jig model can streamline initial layouts. For repetitive circular features, a compact rotary table with a reliable chuck offers consistent indexing. When handling irregularly shaped parts, a four-jaw chuck setup may provide the necessary centering accuracy. Always verify that your mounting hardware, table height, and spindle clearance meet your machine’s specifications before purchasing.